I have a distribution list for our trade department called 'trade' (genius I know). Recently a couple of people left the company and one person moved to a new department. I deleted the users that left and removed the guy who moved departments. However the users are still being sent the emails.

When I run tracking on the exchange mail server (Version: 6.5.7638.1) I see the mail on the list being sent - (fine) but then I see it being sent again to the list with the people who have been deleted. If I expand the list it just shows the correct list in outlook (2007) I have tried downloading the address book and deleting the nk2 file but still the issue persists.

I'm guessing it is a problem with the exchange server configuration?

I hope that makes some sort of sense. Its quite difficult to explain. Any help appreciated,

So you're saying that you deleted the user accounts AND their entries in the Distribution List? Do you have your distribution lists set up to contain users, or do they just contain groups that the users are part of? Perhaps you could track the memberships within the distribution list leading all the way back to the users.

Something that I've run into that's similar, although maybe not the same, is where a user had set up a Delegate in Outlook. The person who they listed as their delegate left the agency long ago. Somehow, though, when you add this current staff member to a meeting, you later get a message that the former staff person was unable to receive the invite. I think I know who the staff person is that is causing this, but have never had time to go troubleshoot with them.

Are you using Cached Mode? If so this is where cached mode is not fun. If you blow away their cache and then have them re-sync it, it should show up correctly. What probably is happening is the users that are sending to that DL are in cached mode and they still have those users cached in that DL.

Thanks for putting the time in on this. Its probably soemthing really silly, it doesn't happen with any other DL in the company.....

Sorry, I didn't make myself too clear. If we just base this on the user that has moved departments and forget the ones that have left. I have just removed them from the DL not removed them from the AD.

The DL contain only users. they are not even very big. 18 people thats all. see the attached screen shots. one showing the DL in outlook and one of the trace on the mail sent.

Its not the cached mode that is the problem because when I check the list on the client (see attached) it shows correctly.

Thanks for the comments guys, hopefully the screen shots will clarify things a bit.